Grain-weigher



(No Model.)

H. A. STOCK.

- GRAIN WEIGHER.

No; 513,659. Patentgd Jan. 30, 1894.

WWW

m. 8 E W n w UNITED STATES PATENT OFFICE.

HARRY A. STOCK, OF MILLERSBURG, PENNSYLVANIA.

GRAIN-WEIGHER.

SPECIFICATION forming part of Letters Patent No. 513,659, dated January30, 1894.

Application filed March 27,1893. Serial No. 467,3Z (N0 model- To allwhom it may concern:

Be it known that I, HARRY A. STooK, a citizen 0f the United States,residing at Millersburg, in the county of Dauphin, State ofPennsylvania,have invented certain new and useful Improvements inAutomatic Grain-lVeighing Apparatus, of which the following is aspecification, reference being had therein to the accompanying drawings.My invention relates to apparatus for weighing or measuring grain andother substances; and the objects of my improvement are to provide asimple and inexpensive apparatus of this class capable of respondingquickly to the desired limit of weight of grain poured therein, thedevice possessing great sensitiveness and capacity for correctlyweighing grain and other seeds. I attain these objects by theconstruction illustrated in the accompanying drawings, in which Figure1, is a perspective view of a grain weighing scale constructed inaccordance with my invention. Fig. 2, is a transverse vertical sectionof the same showing the grain bin swung partly to one side. Fig. 3, is alongitudinal vertical section of a portion of the upper hopper and grainbin showing the adjustable bearing of the latter. Fig. 4, is aperspective view of said adjustable bearing attached to a portion of theend wall of the grain bin.

In the drawings A represents the frame at each end of the apparatus.Said frame is preferably in the form of the letter X with a ring Aforming the junction of the upper diverging branches with the diverginglegs thereof. Each leg is provided with afoot having a screw tappedperforation therein, in which is placed a screw bolt a the point ofwhich rests upon the ground or upon a suitable base, so that thevertical axis of the apparatus can be made to occupy a perfectlyvertical position. The upper hopper B of the device is preferably madeto rest with its ends within the crotch between the upper branches ofthe frame. The lower end of the hopper is made relatively narrow toeasily and rapidly control the iiow of grain made to pass therethrongh,and in said lower end there is a bottom plate I) havinga series ofsuccessive openings b arranged in a row or rows, the

size of which openings is regulated by means of a plate 0 having alsoopenings 0 Said plate 0 is made to slide longitudinally to regulate thesize of the openings 6 but it may be made to slide transversely for thesame purpose. The plates Z) and c are made in the form of invertedshallow curved troughs, the curvature of which corresponds with thecurvature given to the end boards or plates D of the twin weighing binsD of the apparatus, the upper edge of the central plate D dividing saidbins terminating upon the curvature of the plates D and also the upperedge of the side plates D Thelatter have their upper portions pivotedat,or close to, their upper edges, at (Z to the end plates D, and havetheir lower portions retained adjust-ably to said end plates, by meansof flat lugs d that are secured to the plates D and are slotted toreceive a clamping bolt or screw (1 By these means the size of each binis regulable according to the nature of the grain used in the apparatus,as it is desirable that each bin should be filled substantially up tothe level of its pivot before it has received the proper weight to betilted, to obtain a close and correct weighing of the material. Toobtain this desideratum it is also importantthat the pivotof thebinsshould be as near the top thereof as possible. I have found byexperiments that the position ofsaid pivotshould be at such distancefrom the upper curvature of the plates D that the radius of saidcurvature should be substantially equal to the width of the opening inthe bottom of the upper hopper B, and that the bottom D of the binsshould describe an arc of nearly ninety degrees.

In the drawings Fig. 2, has been placed too close to Fig. 1 and the binsare not represented as at one end of their oscillation.

To prevent some kinds of spherical seeds or grain from advancing too farunder the bottom edge of the side plates D while each bin is beingfilled and its contents weighed, a strip of flexible leather d issecured to said plates D and made to extend below said edge.

To prevent the tilting-of the bins until the proper weight of grain hasbeen received into either one of them, an angular bent rodEhas one endsecured adj ustably to each end plate D of the bins, and it carries onits upper portion a weight F adjustably retained thereon by means of aclamping screw f. Said upper portion can be regarded as a scale beam andis marked with division lines f indicating pounds or bushels or partsthereof, as the case may be.

To provide a nearly frictionless support for the twin-bin, each one ofits supporting rods E is provided with an internally conical bearing Eon its under side in which is received the hardened conical point of abolt a that passes through a screw-tapped hole in the bottom of the ringA of the frame. Said bolts also permit the distance between the upperedge of the bin and the bottom of the hopper B to be regulated. Toproperly adjust the twin bins laterally on this pivot so that thetendency of each bin D to be tilted will be exactly the same, the innerend of each rod E is secured to a plate E that has its top and bottomedges beveled and is received in a dovetailed groove formed in a plate Dattached to the outer face of the plates D, close to their uppercurvature. The plate E is retained in position by means of screws epassing through horizontal slots in the plate E and having their innerends in engagement with the plate D.

To prevent the twin bins from tilting too far, pins (1 project outwardlyin the path of the scale beams E, from the upper end of the frame A. Butsaid pins 0. may be dispensed with, as the tilting motion of the bins isutilized to operate the registering apparatus of the device. For thispurpose a longitudinally movable bar g is guided horizontally withinbent metal straps a secured to one of the end plates of the hopper B.Said bar 9 has either of its ends bent outwardly or has pins gprojecting therefrom near the ends thereof, and said pins project in thepath of the scale beam. The bar 9 is thus slid endwise by said beamuntil arrested by one of the pins 9 striking against the side of one ofthe metal straps a The bar g has pivoted thereto near its center a pawlh, the lower end of which is adapted to engage with a ratchet wheelwhich is the first wheel operated upon in the train of gears of aregistering apparatus of ordinary construction. Said train of gears isnot shown in the drawings. I

The grain escaping from either one of the tilted bins is received in ahopper H supported by the frame, and by which the grain is led into bagsor in any suitable direction.

Having now fully described my invention,

I claim- 1. A grain weighing scale consisting of a hopper having anarched bottom, tilting twin bins having permanently open outlets andtheir pivots adjacent to the top thereof at a distance from the bottomof the hopper substantially equal to the width of said bottom, and aframe supporting the hopper and bins substantially as described.

2. In a grain weighing scale, the combination of a hopper having anarched bottom provid ed with perforations and a perforated plate uponsaid bottom, tilting twin bins, the end plates of which have a convextop and pivot pins at a distance from said top substantially equal tothe width of the bottom of the hop per, and plates D pivoted to the endplates adjacent to their convex top and their bottom laterallyadjustable substantially as described.

3. In a grain weighing scale, the combination of a hopper, tilting twinbins having sides D provided with a convex top, side plates D pivotedthereto and having their lower ends laterally adjustable, leather stripssecured to the lower edge of said plates D and a horizontal plate Dconstituting the bottom of said bin, with a supporting framesubstantially as described.

4. In a grain weighing scale the combination of ahopper, atilting twinbin thereunder, a dovetailed plate D secured to the end plates of saidbin, a plate E adjustably secured to the plate D, an angular bentscale-beamhaving its lower end secured to the plate E a conical bearingon the under side of the scale beam a bolt having its conical endsecured into said bearing and a frame adj ustably supporting said boltsubstantially asdescribed.

5. In a grain weighing scale the combination of a hopper, atiltingtwin-bin thereunder, an angular bent scale-beam adjustablysecured to said bin, a longitudinally movable bar g retained in bearingsattached to the ends of the hopper adjacent to its top, pins 9projecting from said bar g and a pawlpivoted to said bar substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses.I

HARRY A. STOCK.

Witnesses:

OHAs. W. DAY, S. N. KAWEL.

